Valve and valve-seat refinishing tool



March 1, 1933. A. A. RADLEY, JR

VALVE AND VALVE SEAT REFINISHING TOOL Filed Dec. 16, 1931 2 Sheets-Sheet1 l9 2/ V 2 2b 26 /6 If If I 4 [I'l IIYI lll Ill! Inventor I AttorneyMamba-7,1933. A. A. RADLEY, JR

VALVE AND VALVE SEAT REFINISHING TOOL 16, 1931 2 Sheets-Sheet 2 FiledDec,

Inventor Aliorney Patented Mar. 7, 1933 UNITED STATES PATENT OFFICE vALTON A. HADLEY, JR., OF WHITEEISH, MONTANA, ASSIGNOR 0F ONE FOURTH TOJOHN G. HOGAN, OF WHITEFISH, MONTANA VALVE AND VALVE-SEAT REFINISHINGTOOL Application filed December 16, 1981. Serial No. 581,307.

My present invention relates to improvements in valve and valve-seatrefinishing tools of the manually operated type, and adapted especiallyfor use in grinding and. truing valves and valve seats for internalcombustion engines. The rotary grinding tool of my invention involvesthe use of a conical head that is designed for interchange able use asstationary tool holder when grinding the valve, or as a rotary head whengrinding the valve seat, and means are provided whereby the necessarychanges may be made with facility for these alternateuses.

By the utilization of the device of my invention a grinding tool of thischaracter .is provided which is composed of a minimum number of partswhich are readily adjustable and changeable for adapting the tool todifierent uses and to different sizes. and shapes of valves and valveseats. The tool is simple both in construction and operation,

' example of the physical embodiment of my invention in which the partsare combined and arranged according to the best mode I have thus fardevised for the practical application of the principles of my invention.

It will be understood that changes and alterations bem ade in theexemplified structure of the drawings, within the scope of my claimswithout departing from the principles of my invention.

Figure 1 is a vertical sectional view of part of an internal combustionengine showing one of its valves and seat, and the grinding tool alsopartly insection in position to grind the valve seat.

Figure 2 is a perspective view of the tool head, with its ratchet headremoved, and adapted to be clamped in a vise and used as a tool holderfor the rotaryvalve grinding 0perationf l t Figure 3 is a top plan viewof the ratchet head (partly broken away for convenience of illustration)which is employed in grindin the valve seat.

Figure 4 is a transverse sectional view at line 4l4 of Figure 1.

Figure 5 is a transverse sectional viewat line 55 of Figure 3.

Figures 6 and 7 are perspective views of different types of drivingheads for use on different types of valves.

In order that the general arrangement, relation of parts, and utility ofthe invention may readily be understood I have shown in Figure 1 part ofthe cylinder C and piston P of an internal, combustion engine, togetherwith a valve 1 and its stem 2, and the guide bushing 3 for the stem. Thevalve seat 1 is shown as being ground, and the valve is elevated fromits seat in order to accommodate the grinding tool and permit itsoperation, in

grinding and truing the seat, with the tool supported on the stem.

In carrying out my invention, I utilize a hollow cone-shaped tool head5, which, at the apex of the cone is fashioned with a cylindrical collar6, and the collar is arranged with diametrically arranged, fiat,exterior faces 7, by means of which the head, as a non-rotary holder,may be rigidly clamped between the jaws of a vise when the valve 1 isbeing ground, it being understood that the valve itself is rotated orrevolved within the hollow conical, inverted, head.

At the larger, or upper end of the inverted cone shaped head acylindrical flange 9 is fashioned, and this flange is formed with fourdiametrically disposed V-shaped or wedge shaped notches 9. Within thelower end of the head, and seated in the collar 6, is a removable guidebushing 10, of cylindrical shape, and provided with a flaring flange 11to support the bushing in the collar at the lower end of the head.Interchangeable bushings are employed, andprovided with various sizesofbores to accommodate different sizes of valve stems, and these bush-Iings may be removed and replaced within provided a series oflongitudinally extending, vertical slots 12, and these slots are formedwith continuations or extensions 13 in the cylindrical or annular flange9 of the head, as best seen in Figures 1 and 2.

A complementary number of abrading tools, or files 15, are retained inthese slots, and the latter are fashioned with tongues 14 in theopposite side walls of the slots 12, for co-action with complementarygrooves 16 in the sides of the files. The files are provided with twofaces, the outer face for frictional engagement with and grinding of thevalve seat, and the inner face for engagement with and grinding of thevalve rim or edge.

These files are slipped into the slots of the conical head by firstinserting them through the slots 18 of the annular flange, and when thegrooves of the files are fitted over the tongues of the slots 12, thefiles are slid downwardly into the slots, the close frictional contactbetween the files and the walls of the slots being sufiicient to holdthe files in place for the grinding operations. As seen in Figure 2, theinner faces of the files project within the inner face of the hollowconical tool head, and the outer faces of the files project beyond theouter face of the tool head. The tool heads may be made of differentsizes or shapes, that is, the angle of the taper may be acute or obtuse,depending on the angularity of the valve seat and the valve rim or edge,but of course the an ularity of the files will be complementary to theangularity of the valve seat and valve-rim, and of course the files on atool head are all uniformly set for an even grinding or truing of thevalve seat or of the valve.

In Figure 1 the tool head is supported on the valve stem and the valveseat, with the valve within the head, and the head is to be rotated sothat the abrading tools will grind the valve seat 4. I

For revolving the tool head I employ a removable, and reversible ratchethead, which is removed when the valve is to be .ground, and'which may bereversed or inthe holder. A of pawls 22 are diametrically arranged toengage the ratchet teeth and pivoted at 23 on the ring it with springs24: to retain them in engagement with the ratchet teeth. 7

The ratchet head is of less diameter than the interior of the open upperend of the tool head, and it is provided with four, diametricallyprojecting, radial arms 25 having two pairs of beveled faces 26 adaptedto fit snugly into the complementary notches 9 of the tool head. Whenthe ratchet head is reversed 'Or inverted these beveled arms are adaptedto seat in the notches for use in turning the head 5 in clockwisedirection, or in anti-clockwise direction.

For turning the tool head, through the instrumentality of the ratchethead a crank 27 is employed, and this crank as shown is square in crosssection to fit into and pass through the square hole 18 of the ratchetring R, while it freely passes through the circular hole 20 in the coverplate of the ratchet head. 7

The ratchet ring turns with the crank and the holder 17 turns withthering, and through the radial arms 25, the tool head is revolved asthe crank is turned.

As a support and guide for the crank, the

latter is connected with the valve, as indicated in Figure 1, forgrinding the valve seat. At its lower end the crank 1s fashloned with asocket 28 and provided with a cotter pin 29 for connection with thevalve. In Figures 6 and 7 two types of coupling heads are shown for usewith different types of Figure 1, and the tapered head 31 with itsopening or hole 32 fits into the socket 28 of the crank and is securedtherein by means of the cotter pin 29.

In Figure 7 the coupling head is fashioned with a blade 33 similar tothe end of a screw driver, and the tapered head 31 is secured in thecrank socket by means of the cotter pin that is passed through theopening 32.

When the valve is to be ground. it is removed from the engine block, andby means of its fiat faces 7, is rigidly clamped in the jaws of a vise,after which the stem of the valve is slipped through the hollow head,and bushing 10. The crank 27 is passed through the ratchet head andcoupled with the valve head, and the ratchet head is sup ported in thestationary, conical, holder 5, by arms 25. The ratchet ring R within theratchet head, however, revolves with the crank, but in a directionreverse to that which would engage the pawls with the ratchet teeth.

The ratchet head thus becomes a stationary support, and the ratchet ringbecomes a rotary guide inthe ratchet head for the crank as it is turnedto grind the valve on the stationary files or abrading tools. Thus, whengrinding the valve, the crank is turned in direction opposite to that inwhich it turns when grinding the seat, unless the ratchet head isremoved and inverted or reversed as to its position on the crank.

Inasmuch as the conical tool head has a uniformly tapered shape, and thefiles mounted therein have parallel inner and outer grinding faces, itwill be apparent that the taper of the valve seat and of the valve rimis the same, to insure a close and accurate fit of the valve in itsseat, after grinding.

From the above description taken in connection with my drawings it willbe apparent that the parts of the tool may readily be assembled for usein grinding valve seats, and with equal facility the parts may bedismantled and re-assembled for use in grinding the valves, and theremovable and inter- 0 changeable parts may be changed and replaced whennecessary with convenience and dispatch.

When it is desired to perform the grinding of the valve and the valveseat at one time and with one operation, this is readily accomplished bythe set up of the tool as shown in Figure 1, in which the ratchet willrotate the tool-head to grind or surface the valve seat and the reversedirection of the crank will rotate the valve to grind its rim on edge toa proper fit with the valve seat.

Having thus fully described my invention what I claim as new and desireto secure by 3 Letters Patent is:

1. The combination in a tool as described with a hollow, inverted,conical, head having an upper cylindrical flange and notches in saidflange, said head having slots therein extending into said flange, andtongues on the opposite side walls of the slots in the head, ofcomplementary files having lateral grooves in sliding engagement withthe tongues, a removable rotary driving head, and radially disposed armson said driving head in engagement in the notches of the flange.

2. The combination in a tool as described, with a hollow invertedconical head having an upper cylindrical notched flange, said headhaving slots therein extending into said flange, and tongues on theopposite side walls of the slots in the head, of complementary fileshaving lateral grooves in sliding engagement with said tongues, aremovable rotary driving head and attaching means thereon for joint usewith the notched flange, said conical head having a cylindrical collarat its loWer end, a guide bushing seated in the collar, and an upperflaring flange on said bush- 0 ing supported in the conical head.

In testimony whereof I aflix my signature.

ALTON A. RADLEY, JR.

